MESON Chess Problem Database

Problem Display
PID: 6791 (1n2Q1K1/5P2/np2N2p/4B2R/2Bpk1bR/5p1p/6rq/b4N2 w - - 0 1)

Mansfield, Comins

Skakbladet, 1933

1n2Q1K1/5P2/np2N2p/4B2R/2Bpk1bR/5p1p/6rq/b4N2

#2

9 + 12

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qa8#
  • Tries
    • 1.Sc5+?
      • 1...bxc5
        • 2.Bxh2#
        • 2.Bg3#
      • 1...Sxc5!
    • 1.Sg5+?
      • 1...Kf5
        • 2.Bd3#
        • 2.Qe6#
        • 2.f8Q#
        • 2.f8R#
      • 1...hxg5!
    • 1.f8Q?
      • threat
        • 2.Qg6#
        • 2.Qf5#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qxe5!
    • 1.f8R?
      • threat
        • 2.Qg6#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qxe5!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Re5#
      • 1...Bf5+
        • 2.Sg5#
      • 1...Bxh5+
        • 2.Sg7#
      • 1...Bxe6+
        • 2.Bg3#
      • 1...Qxf4
        • 2.Sc5#
      • 1...f2
        • 2.Sd2#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qa8#
      • 1...d3
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(l);N_GUARD::QAB(H),XS(l)
    • S(l);OGATE::QAB(H)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • S(i);XS(F)
    • Try
      • S(F);CHECK
      • Refutation
        • P(k);XS(F)
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD,N_SPINB(h)::QAR1(G),XQ(c)
      • Refutation
        • Q(c);XB(D)
    • Try
      • P(G);
      • Threat
        • QAB(H)
      • Vars
        • Q(c);N_GUARD,N_SPINB(h)::R1(G),XQ(c)
      • Refutation
        • Q(c);XB(D)
  • Actual
    • B(D);N_PINB(h)
    • Threat
      • R1(E)
    • Vars
      • B(h);CHECK,SBLOCK::QAR(H)+S(F),DCHECK
      • B(h);CHECK,N_GUARD,XR(E)::QAR(H)+S(F)
      • B(h);CHECK,OGATEB,P_PINP(G),P_SPINB(h),XS(F)::R(C)+B(D)
      • Q(c);SBLOCK,XB(D)::QAR(H)+S(F),DCHECK
      • P(d);S_CUTR(b)::S(A)
      • S(l);N_GUARD::QAB(H),XS(l)
      • S(l);OGATE::QAB(H)
      • P(f);SBLOCK::B(B)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).